package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //  后期需要进行md5加密，然后再进行比对
        //对前端数据进行MD5加密处理
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }



    /**
     * 新增员工
     * @param employeeDTO
     */

    @Override
    public void save(EmployeeDTO employeeDTO) {
        //System.out.println("当前线程id为"+Thread.currentThread().getId());

        //将前端数据封装到DTO，但后端识别数据还应该是Employee实体类中的数据
        Employee employee=new Employee();

        //相同对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号的状态，1正常0异常
        employee.setStatus(StatusConstant.ENABLE);

        //设置默认密码123456，记得MD5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //设置新增员工id
        //
        //在JWT中设置用户ID，在service层调用并传给前端数据
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);


    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //使用插件进行分页查询的计算，告诉插件第几页，获取前端输入的页数和最大数量，底层mybatis的拦截器，SQL语句进行动态拼接limit
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //返回值固定，必须是page类型PageHelper提供的
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
       long total= page.getTotal();
        List<Employee> records=page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {

//        Employee employee=new Employee();
//        employee.setStatus(status);
//        employee.setId(id);
        //可以使用常规方法创建对象，也可以使用构建器创建
        Employee employee=Employee.builder()
                         .status(status)
                         .id(id)
                         .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(long id) {

        Employee employee=employeeMapper.getById(id);
        //密码加密
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //将前端数据封装到DTO，但后端识别数据还应该是Employee实体类中的数据
        Employee employee=new Employee();

        //相同对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

       // employee.setUpdateTime(LocalDateTime.now());


        //在JWT中设置用户ID，在service层调用并传给前端数据
        //employee.setCreateUser(BaseContext.getCurrentId());
      //  employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
